Array Product CodeForces - 1042C (细节)

#include <iostream>
#include <sstream>
#include <algorithm>
#include <cstdio>
#include <math.h>
#include <set>
#include <map>
#include <queue>
#include <string>
#include <string.h>
#include <bitset>
#define REP(i,a,n) for(int i=a;i<=n;++i)
#define PER(i,a,n) for(int i=n;i>=a;--i)
#define hr putchar(10)
#define pb push_back
#define lc (o<<1)
#define rc (lc|1)
#define mid ((l+r)>>1)
#define ls lc,l,mid
#define rs rc,mid+1,r
#define x first
#define y second
#define io std::ios::sync_with_stdio(false)
#define endl '\n'
#define DB(a) ({REP(__i,1,n) cout<<a[__i]<<' ';hr;})
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int P = 1e9+7, P2 = 998244353, INF = 0x3f3f3f3f;
ll gcd(ll a,ll b) {return b?gcd(b,a%b):a;}
ll qpow(ll a,ll n) {ll r=1%P;for (a%=P;n;a=a*a%P,n>>=1)if(n&1)r=r*a%P;return r;}
ll inv(ll x){return x<=1?1:inv(P%x)*(P-P/x)%P;}
inline int rd() {int x=0;char p=getchar();while(p<'0'||p>'9')p=getchar();while(p>='0'&&p<='9')x=x*10+p-'0',p=getchar();return x;}
//head

#ifdef ONLINE_JUDGE
const int N = 1e6+10;
#else
const int N = 111;
#endif

int n, cnt, a[N];
set<int> s;
vector<int> v, f;
void pr() {
	v.clear();
	for (int x:s) v.pb(x);
	int sz = v.size();
	REP(i,0,sz-2) {
		printf("1 %d %d\n",v[i],v[i+1]),++cnt;
	}
}
int main() {
	scanf("%d", &n);
	REP(i,1,n) {
		scanf("%d",a+i);
		if (!a[i]) v.pb(i);
		if (a[i]<0) f.pb(i);
		s.insert(i);
	}
	int sz = v.size();
	if (sz==n) return pr(),0;
	REP(i,0,sz-2) {
		printf("1 %d %d\n",v[i],v[i+1]),++cnt,s.erase(v[i]);
	}
	if (f.size()%2) {
		int mx = -2e9, pos;
		for (int x:f) if (a[x]>mx) mx=a[x],pos=x;
		if (v.size()) printf("1 %d %d\n",pos,v.back()),++cnt,s.erase(pos);
		else printf("2 %d\n",pos),++cnt,s.erase(pos);
	}
	if (cnt==n-1) return 0;
	if (v.size()) {
		printf("2 %d\n",v.back()),++cnt,s.erase(v.back());
	}
	pr();
}